GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Radio/Audio System Schematics

DEFINITION:

1

  1. Turn the ignition and the radio on.
  2. Check for distorted or inoperative speakers using the fader and the balance controls with all the of the sources (AM, FM, tape, CD).

2. Are the speakers distorted or inoperative?

Go to Step 2

Go to Step 4

2

Check the speakers and terminals for contact with the vehicle body.

Is there anything loose or in the way of the speaker causing the problem?

Go to Step 3

Go to Step 4

3

Make the necessary repairs to secure the component causing the problem..

Is the repair complete?

System OK

_

4

  1. Disconnect the speakers.
  2. Using an ohmmeter, test the speaker wires for a short to ground.

Does the ohmmeter indicate a short?

Go to Step 5

Go to Step 6

5

Repair the short circuit between the speaker connector and the radio connector.

Is the repair complete?

System OK

6

Substitute a known good speaker for the speaker causing the distortion.

Is the distortion eliminated?

Go to Step 7

Go to Step 8

7

Replace the speaker.

Is the repair complete?

System OK

_

8

Replace the audio system.

Is the repair complete?

System OK

_